Keoni sits next to 3 phonetic neighbors — Kioni, Keanu, and Leoni are the closest matches by sound. Most share Keoni's Hawaiian cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"God is gracious"
"lamplight, torch"
"mountaineer, enlightened"
"noise, tumult"
"praised, praiseworthy"
"narrow land, island"
"fallow land, meadowland"
"possibly from Arabic qamar (moon)"
"descendant of Prophet Muhammad"
"myrrh, fragrant oil"
"son of Dubhagan (little dark one)"
"dweller near the woods"
"to close, knot"
"descendant of the courageous one"
"lime tree hill"
"Yahweh is merciful"
"good, beautiful, handsome"
"jaybird + euphonic suffix"
"bright, splendid"
"ruler of peace"
"lion"
Similar sound: These names share phonetic patterns with Keoni — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew via Hawaiian origins, giving them the same cultural heritage as Keoni.
Rhythm: Keoni is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.